class_docstr: DatasetBuilder for quac dataset.
code: def _info(self):
      return self.dataset_info_from_configs(
          features=tfds.features.FeaturesDict(
              {
                  "context": tfds.features.Text(),
                  "followup": tfds.features.Text(),
                  "yesno": tfds.features.Text(),
                  "question": tfds.features.Text(),
                  "answers": tfds.features.Sequence(
                      {
                          "text": tfds.features.Text(),
                          "answer_start": np.int32,
                      }
                  ),
                  "orig_answer": tfds.features.FeaturesDict(
                      {
                          "text": tfds.features.Text(),
                          "answer_start": np.int32,
                      }
                  ),
                  "section_title": tfds.features.Text(),
                  "background": tfds.features.Text(),
                  "title": tfds.features.Text(),
              }
          ),
          homepage="https://quac.ai/",
          supervised_keys=("context", "answers"),
      )
  
file_path: datasets/tensorflow_datasets/datasets/quac/quac_dataset_builder.py
imports: from __future__ import annotations
  import json
  from etils import epath
  import numpy
  import tensorflow_datasets.public_api
label_desc: Use image node_id 1 for calling the Builder obj's underlying member method code with example usage: obj._info() and returns: self